<!-- VUE在_data中做了数据劫持 -->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
</head>
<body>
    <div id="root">
        <h2>title: {{_data.title}}</h2>
        <h2>content: {{_data.content}}</h2>
    </div>
</body>
<script>
    let data ={
        title: "这是一个标题",
        content: "这是一条内容"
    }
    const vm = new Vue({
        el: "#root",
        data
    });
</script>
</html>